Battery light - Page 2

SD1too · 30th June 2021, 17:16

Thanks Ed. 14.2 v is good but it's low at idle. With those voltages I'm not sure how the warning light can be off at idle but illuminated at normal engine speeds.

Simon

dave lincs · 30th June 2021, 18:20

I'm sure you have a fault alternator

rover_ed · 30th June 2021, 18:40

Please ignore those got them wrong some how its 12.4 engine off and its 14-14.2 idleing and driving

SD1too · 30th June 2021, 21:45

Quote:

Originally Posted by rover_ed

... its 12.4 engine off and its 14-14.2 idling and driving

Those are also good readings. I'm still puzzled as to why your battery warning light is illuminating.

Simon

squire · 1st July 2021, 06:47

Quote:

Originally Posted by SD1too

Those are also good readings. I'm still puzzled as to why your battery warning light is illuminating.

Simon

Although mine 75 is diesel it's a similar fault I guess, there's a wire shorting out so that 12 volts are not getting to the warning light to extinguish it. I might not of explained it very well but that's the gist of it I'm led to believe.

Martyn

COLVERT · 1st July 2021, 18:58

Quote:

Originally Posted by SD1too

Those are also good readings. I'm still puzzled as to why your battery warning light is illuminating.

Simon

The reason I quoted in my previous post on this thread.

The voltage at each side of the lamp must balance for the light to go out. A failing connect in either of the wires to the lamp will cause it to flicker.

Simple.---

SD1too · 2nd July 2021, 06:53

Quote:

Originally Posted by COLVERT

The voltage at each side of the lamp must balance for the light to go out. A failing connect in either of the wires to the lamp will cause it to flicker.

Simple.---

Well, perhaps not so simple Jon.

The "lamp" is an LED and it's integral with the instrument pack. There is only one external wire connection.

Over to you!

Simon

COLVERT · 3rd July 2021, 11:11

Quote:

Originally Posted by SD1too

Well, perhaps not so simple Jon.

The "lamp" is an LED and it's integral with the instrument pack. There is only one external wire connection.

Over to you!

Simon

Well that must be the one then unless it's a dry solder joint on the instrument pack or the LED itself is about to expire.---

rover_ed · 7th July 2021, 20:03

Just informing you that i am no further into finding the issue here having checked what wiring i could with no result

trikey · 7th July 2021, 20:18

Quote:

Originally Posted by rover_ed

Just informing you that i am no further into finding the issue here having checked what wiring i could with no result

I would run a wire from the alternator to a separate bulb and see if the issue replicates itself there, if it does it must be an alternator fault, if not its a wiring issue.

30th June 2021, 17:16	#11
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Thanks Ed. 14.2 v is good but it's low at idle. With those voltages I'm not sure how the warning light can be off at idle but illuminated at normal engine speeds. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

30th June 2021, 18:20	#12
dave lincs Posted a thing or two Rover 75 Saloon Join Date: Mar 2014 Location: Louth Posts: 1,409 Thanks: 380 Thanked 986 Times in 476 Posts	I'm sure you have a fault alternator

30th June 2021, 18:40	#13
rover_ed Avid contributor MG ZT Join Date: Feb 2014 Location: Walsall Posts: 134 Thanks: 0 Thanked 6 Times in 5 Posts	Please ignore those got them wrong some how its 12.4 engine off and its 14-14.2 idleing and driving

7th July 2021, 20:03	#19
rover_ed Avid contributor MG ZT Join Date: Feb 2014 Location: Walsall Posts: 134 Thanks: 0 Thanked 6 Times in 5 Posts	Just informing you that i am no further into finding the issue here having checked what wiring i could with no result